Multiple-spindle drill



June 5, 19.23. 1,457,387

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MULTIPLE SPINDLE DRILL Filed March l2 1921 18 Sheets-$heet 17 INVENTORJune 5, 1923.

1,45 7,38'7 F. E. NEITZEL fMULTIPLE SPINDLE DRILL Filed March 12, 192118 Sheets-Sheet 18 ATTORNEYS Patented June 5, 1923.

:FRANK EGON Nnrrznr., or SAN FRANCISCO, OALIFORNiA, V.essreivon ro.nnfrrrrininlvr SHIPBUILDING CORPORATION. A CORPORATION OFDELAWARE.

MULTIPLESPINDLE DRILL.

Appncaun"ied'narcnia 1921. seriai No. 451,737'.

To all/whom t mag/concern;

- Be it known that'l, FRANK EGON Niemann, a citizen of the UnitedStates, residing at San Francisco, county or" j San Francisco, State ofCalifornia, have invented a new and useful `Mlultiple-Spindle Drill, ofwhich the following'is ay speciication. l In my prior application -tiledJuly 81st, 1919, Serial No. 314,510, 1 have illustrated and genericallyclaimed a novel construction of multiple spindle drill, the claims beingdirected 'fmore particularly 'to the multipule spindle drill, per se,while `my present in-v vention is directed more particularly to thefeeding and controlling mechanism for the worlr table.

l/Vith the above in view, my! invention comprehends a vnovelconstruction of multiple drill which is especially designed or'drillingthe holes for .tubes in boiler drums, al-

though as is apparent, it can 'be employed.

in 'all cases wherein it is desired to simul, taneously drill or vream amultiplicity of holes. "Y It` furthercomprehends a novel constructionand arrangement of a drill head,inovel means ormounting the drill headsso that they may be brought into closelyspaced relationship, noveldriving mechanism for the spindles carried by the drill'heafls and anovel construction and arrangement of mechanism for controllingthespindle driving mechanism.

Other novel features of'constructio'n and advantagewill hereinafter moreclearly appear in the detailed description of theinvention.

For the ypurpose of illustrating one manner vof carrying out myinvention in practice, I have shown in the accompanying drawings atypical embodiment or it which in practice will give satisfactory andreliable results. 1t is, however, to be understood that this embodimentis typical only and that the various instrumentalities 'ofwhich myinvention consists can be variously are ranged and organized and thatthe inven` tion is not limited to the precise arrangement andorganization of these `instrumentalities asherein set forth.

Figure 1 represents, infront elevation, a' multiple spindle drill,embodying my in-v vention.

Figure 2 represents a top plan view of the drill.

the drill, viewed tween the spindle sockets.

.Figure 3 represents an lend elevation of from the left-hand side 'orthe machine. i i y i 'i Figure 4 represents an end elevationof thedrill, viewed from the right-hand side of the machine.

Figure 5 represents, in perspective, a trip-y ping device employed andadjuncts. c'

Figure 6 represents, on an enlarged scale, an end elevation Ofcertainparts left-hand side of the machine. `Figure represents a plan View,partly yin section, of certain features of construction at the left-handside of the machine.v i

Figure 8 represents a section Online '8-8 Figure 7. i

Figure 9` represents, in perspective, and in detached position, a nut,employed which is shown in assembled position in lFigure 8. `Figur J`10 represents a section` on 4line 10-10 Figure 2., v 4 Figure 11"represents a section =on line 11-11 Figure1. l f f i Figure 12represents an end elevation,

certain of its anni s @5 seenat the 'partly in section, of certainfeatures of 4the table cont-rolling mechanism.

tion, a bolt and the stop Whichit carries.

Figure Y1.6 representsy a" bottom* plan view of the construction seen inFigure 15.'

Figure 17 represents a section on' line 174-17 of Figurei2,.showing morepalrticularly the manner in-which the kdrum and' certain of itsadjun'cts 'are mounted.

l18 of Figure'19.v

Figure 19 represents a section on,` -line 19e-19 or Figure 18. y

Figure 18v represents a'sectioir on line- Figure 20 represents vasectiononline 20--20 of Figure 1, showing more clearly the manner inwhich thespindles are mounted and driven.'

1 Figure V21frep'resents `a sectionfon line n 2 1-421'Of`vFigure 1.

g Figure 22 represents 22-22 oFiguI'e 1. l

VvFigure 23, represents,'in sectional elevaT tion, another embodiment otmy invention wherein spacing elements-are employed bea section on lineist Figure 24 represents, in perspective, a spacing element. seen inFigure 23.

Figure 25 represents a section on line 25-4-25 of Figure 1 showing moreclearly, on an enlarged scale, the manner in which the drill spindlesare mounted and driven.

Figure 26 represents. in front elevation, the feed gear box and certainof its adjuncts.

Figure 27 represents a section on line 27-27 of Figure 26.

Figure 28 represents a section on line 28-28 of Figurey 1. showing moreclearly the friction feed, and the manner in which it is controlled.

Figure 29 represents a section on line 29-29 of Figure 27.

Figure 3() represents a. section on line 30-30 of Figure 29.

Referring to the drawings.

a. section on line reference indicate The framework of the machine.

The framework of the machine consists of a base-or foundation 1 to whichare connected side frames 2, braced at their upper end by means of across-beam 3 of structural metal of any desired shape. The base 1 isprovided with laterally extending tracks 4, see Figures 1 and 2, whichextend outwardly beyond the base and are supported at their outer endsby brackets 5 connected to the base. The tracks are adapted to havemounted on them a work carrying table 6, having the depending ribs 7,see more par ticularly Figure 1, which are guided in the slots 8 in thetrack 4.

The table 6 is provided with means for actuating it, and such means willbe hereinafter fully set forth.

The base of the machine carries a main driving motor 9, see Figure 4,the shaft of which is provided with a pulley 10, around which passes abelt 11, which also passes around a compound pulley 12 which is mountedon a counter-shaft 13 journalled in the side frames.

14 is a belt which passes around the pullev 12 and also around acompound pulley 15 mounted on a shaft 16 carried by a side frame 2. Abelt 17 passes around the pulley 15 and around a pulley 18 mounted on ashaft 19 which also has mounted on it a pulley 20, around which passes abelt 21, which also passes around a pulley 22, mounted on a shaft 23journalled in the machine framework. f

The feed gear bow. y The shaft 23 extends into the feed gear box 24which is carried by the cross beam 3, which connects the side frames 2.The shaft 23 is provided with a pinion 25, see Figure 29, which mesheswith a gear 26, the hub of which is loosely mounted on a` shaft 27journalled in the gear box.

The shaft 23 is also provided with a worm 28 which meshes with a wormwheel 29, see Figure 30, mounted on a shaft 30, which latter also hasmounted on it a Worm 31, which meshes with a worm wheel 32, the hub ofwhich is loosely mounted on the shaft 27. The hub of the gear 26 isprovided with a clutch face 33, which co-operates with a clutch face 34of a clutch collar 35, which latter is also provided with a clutch face36, which co-operates with a clutch face 37 of the worm Wheel 32, sothat the shafts 23 and 27 can be operatively connected with each uother.

The clutch collar 35`is sllidingly mounted on and keyed to the shaft 27to rotate in unison with it and the clutch collar 35 is provided withayoke 38, which is fulcrumed y 46 is secured to the forward end of therock shaft 45. The rock shaft 45 has loosely mounted on it an actuatinglever 47 to which is connected one end of a slide bar 48 guided in asleeve 49 on the feed gear box 24, see Figures 1 and 26.

The bar 48 is provided with an inclined or bevelled face 50, see moreparticularly Figure 26, which merges into a straight face 51, and thefree end of the slide bar 48 is provided with a downwardly extending lug52.'

53 designates a roller which normally engages the straight face 51 andthis roller is carried by a spring-pressed plunger 54, which is keyed ina bracket 55 so as to have only longitudinal movement, and a spring 56is provided which tends to retain a stop arm 57 on the plunger in itsupward or operative position and in the path of an arm 58 which extendsthrough a slot 59 in the feed gea-r box and is connected to the yoke 38,see more particularly Figure 30.

I provide a. holding device for such yoke 38, which consists of aplunger 60, see more particularly Figure 30, slidable in a sleeve 61extending through a wall of the feed gear ico box 24. A spring 62 isprovided one end of which abuts against the plunger While its oppositeend abuts against an adjusting screw 63 in engagement with the sleeveand provided with a lock nut 64. The plunger

